Techno Duck

I am strongly considering Turbonetics T04E 50 trim with 48lb/min compressor or the 60 trim with 50lb/min compressor with #8 hotside from Pauertuning. I was wondering what results people were getting with them, such as when they are seeing 1-bar of boost and what kind of HP levels at 15psi?

My goals are hopefully 300whp at about 15psi and in the area of 350whp at 17-18psi. I am also hoping to see 1-bar of boost in the lower 3k rpm range. Should this turbo get me close to those numbers?

I have talked to Vic at PauerTuning who has been exceptionally helpful in answering my questions, but i figure its always good to try and get some outside opinions.

I know the Vitesse Stage 3 turbo is probably pretty darn close to what i am looking for, but from a cost standpoint i think its going to be way out of my budget (im waiting to hear back on cost). But then again, i thought buying the Vitesse MAF was out of my budget..and i ended up buying one of those, so who knows .

IanM

Your goals seem fairly realistic. You may or may not be able to hit 350rwhp at 17-18psi, depends on the state of your motor and state of tune, type of fuel, other mods etc.

I used to run a T04E 57 trim w/ a KKK #8 hotside and Stg3 turbine wheel. Standard bearings. Made 305 rwhp at 14psi, 312 rwhp at 15psi and 325rwhp at 17psi. Hit 1 bar at about 3150rpm in 4th gear.

I then swapped out the 57 trim compressor wheel for a 60 trim wheel (compressor housing inlet machined for larger inducer size). I did not see any change in power, almost identical dyno numbers. Slightly more lag, hit 1 bar at about 3250rpm. Perhaps turbo would have made more power at high levels of boost, but I don't run more than 17psi on the street or track.

I'm now runnning a full Garrett turbo - T04E 50 trim w/ 0.63 A/R T3 turbine housing and Stg3 wheel, dual ball-bearing cartridges (see avatar). Have not dynoed but power feels similar, maybe slightly better, with less lag. Breathes very well at high end with larger T3 turbine housing. Hits 1 bar at just over 3000rpm. Compressor maps show that the 50 trim wheel is in it's sweet spot (wide efficiency islands) at the boost levels I like to run (15-17psi).

Techno Duck

Thanks Ian, that is basically exactly what i wanted to know. So for my goals, do you think the 60 trim with 50lb/min compressor wheel is the way to go?

Trucho-951

Although a 60 trim compressor will flow more air than a 50 trim compressor, it is also more susceptible to destructive compressor surge. Just look at the 60 trim compressor map, find the 18 lb/min line and follow it up vertically, see what’s the highest boost the compressor can generate (maximum pr = 1.9, or 13 psi of boost) above this pressure the compressor enters the surge zone.

Note - the 18 lb/min is roughly the mass air requirement for the 2.5 L 951 engine @ 3,000 rpm under full boost (the NA engine requires 9 lb/min @ 3,000 rpm.)

Not saying the 60 trim won’t work for you, just saying be careful in how you set it up.
What stage turbine wheel were you considering for that #8 hot housing?

porschefig

Trucho-951:

where does the info on NA lb/min come from... I'd like to know what it requires across the range.

EDIT: are you just computing it and assuming 85% efficiency???

Techno Duck

I am guessing its a stage 3 wheel, but i would need to ask Vic to know for sure.

Is there anything inbetween the 50 and 60 trim turbo's.. i guess a happy medium?

Raven951

check out a 57 trim turbo

SamGrant951

^ thats what I have Jon, very happy.

MichelleJD

^ Me too, but I just put it on and haven't driven it yet. I'll let you know how it feels

IanM

I wouldn't recommend the 60 trim wheel. As per my post above, I did not see any increase in horsepower, just more lag. I would recommend the T04E 50 trim or 57 trim. Both are great wheels. The flow differences between the two are marginal. The shop I bought my turbo from highly recommended the 50 trim, which is why that's the one I'm now running. My current turbo is very common with the "import tuner" crowd. There are (apparently) lots of Neon SRT4's running the exact same turbo and making well over 400rwhp.

Techno Duck

Im going to go with the T04E 57 trim. It seems like exactly what im looking for. Thanks for all of the input, i really do appreciate it. Hopefully ill have everything in by December or so.

blown 944

That is a good choice.

I would agree with the 60 trim as being a not so good choice, the compressor map is really good for those running low boost 10 psi or so

the 57 had better initial power but the 50 had a slightly quicker spool (transient). Not really noticeable I liked the feel of the 57 better myself.
I am running a T4 hotside so spoolup is quite noticable on my car

actually here is what I would like best with the kkk replica .63 http://www.atpturbo.com/Merchant2/me...egory_Code=GRT

or for those running lower boost

http://www.atpturbo.com/Merchant2/me...egory_Code=GRT

pk951

How would this one do Garrett GT3071R

http://www.atpturbo.com/Merchant2/me...egory_Code=GRT

blown 944

It would do fine but definately not as efficient in the higher boost levels.

basically that is the same inducer as the 50 trim (~53mm with a 71mm exducer vs 76 exducer).

What I have personally found is that the inducer indicates how much power it will make at low to medium boost and the larger exducer will carry it further up the rpms.

If given the choice I would always go for the 3076

Techno Duck

Sid, i would love to do the GT28 'Disco Potato' but i would personally like something that is bolt on in terms of not needing new flanges on the crossover or a custom downpipe. Vic @ Pauerman mentioned to me he is working on something to use the Garret turbine housings on the stock crossover pipe (no modifications needed). I really dont know anything other than that though, but it is something i will be keeping an eye out for in the coming months as a viable alternative to the T04E.

I really have to tip my hat to Vic at Pauerman though, he has been extremely helpful with turbo information and what would suit me best.